/* 
#include <stdio.h>
#include <assert.h>
int* Change_order(int* arr,const int sz){
	assert(arr);
	int* right = arr + sz - 1;
	int temp = 0;
	int i = 0;
	while(1){
		if(arr[i] % 2 == 0 && arr + i != right){
			temp = arr[i];
			arr[i] = *right;
			*right = arr[i];
			right--;
		}
		if(arr + i == right)
			return arr;
		while(arr[i] % 2 != 0)
			i++;
	}
}

int main(){
	int arr[10] = {5,1,2,8,4,7,3,10,6,9};
	int sz = sizeof(arr)/sizeof(arr[0]);
	Change_order(arr,sz);
	for(int i = 0;i < sz;i++){
		printf("%d ",arr[i]);
	}
	return 0;
} 
*/
#include <stdio.h>
int main(){
	printf("hello world!\n");
	return 0;
}
